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(No Model.)

B. M. ARNOLD. HOT WATER HEATER.

Patented June 17, 1890 lNVEN-TCHR \NITNEESEE.

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UNITED STATES PATENT OFFICE.

EDWVARD M. ARNOLD, OF PAVTUOKET, RIIODE ISLAND.

HOT-WATER H EATER.

SPECIFICATION forming part of Letters Patent No. 430,415, dated June 1'7, 1890.

Application filed Tune 26, 1889. Serial No. 315,676. (No model.)

T0 at whom it may concern:

Be it known that I, EDWARD M. ARNOLD, a citizen of the United States, residing at Pawtucket, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Hotater l-Ieaters; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in hot-water heaters, the object being to provide a system of water-ways exposing the greatest possible amount of surface to the action of heat, and I accomplish this by the means illustrated in the accompanying drawings, in which Figure 1 isaperspective plan view, in elevation, of furnace; Fig. 2, a vertical section through front and back Fig. 3, a vertical sec tion through sides; Fig. 4, top view of crosssection on line U V; Fig. 5, same on line NV X; Fig. 6, the grate; Fig. 7, the auxiliary grate.

In the drawings, A designates a furnace constructed of suitable material and in asubstantial manner. The grate exhibited in the drawings and the manner of mounting the same within the furnace I have described in an application this day filed in the Patent Office, Serial No. 315,673, for which I wish to obtain Letters Patent. These walls A form the outer section of the boiler. The inner section, formed preferably in one piece, is firmly secured tothe outer by overlapping joints an d fire-proof packing. This inner secing air-spaces s s, &c., Fig. 2, between legs (Z,

to provide the greatest possible exposure of boiler-surface to the action of the heat. This boiler is also constructed in such a manner as to form an inner face G in the upper part thereof, to allow the hot air to circulate freely through the upper partof said boiler. In the lower part of this face I placea metal V-shaped deflector, designated as H, Fig. 4,by means of which the heat is deflected against the sides and thence arises to the top of the boiler.

h designates apassage, by means of which the heat is conducted to the draft-pipe P.

P designates a draft-pipe, fitted into the rear wall of the furnace by a collar 19. The collar 1) extends within the boiler and is slit on the upper side from the pipe to the side of the furnace, these ends being then spread out to form a passage leading to the passage h.

R designates a section of pipe leading from the ash-pit E to the collarto allow the escape of dust by means of the dampers 'r and r.

T designates the conducting-pipe connectin g with the boiler and radiators.

t designates a return-pipe, and t a faucet for drawing off the Water. WVater can be introduced into the boiler by means of this pipe.

WVater being introduced into the boiler and the fire started, the hot air arises in the direction indicated by the arrow 1. The hot air circulates freely until reaching the position shown by cross-section on the line WV X. Here the hot air, being deflected by the V-shaped deflector, passes in the direction indicated by arrow 2 up through each one of the spaces, h, 850., being continuations of the spaces 3, &c., to the top of the boiler, and thence to the passage h, which leads, as described, to the collar 19 and the draft-pipe P. It will be observed that by means of my construction and employing an inner face, as described, and the V-shaped deflector, thus practically forming a diaphragm into which the heat is deflected, and caused to circulate freely around the upper part of the boiler, and by using comparatively thin Water-legs extending from the upper part down to the fire, leaving sufficient spaces for hot air between the same, every square foot of the boiler is exposed to to the heat, and by this construction attaining all the advantages of a tubular boiler and yet being able to make the same in one piece. These advantages itis unnecessary to enlarge upon, as they are well-known to all conversant with stea1n-boi1ers.

My devices can be employed to equal advantage for converting water into steam and using steam as the heating agent.

WVhat I claim, and desire to secure, is

1. In hot-water heaters, the combination of a fire-pit suitably mounted and an inclosed steam-tight vessel consisting of a series of vertical water'legs extending down to the firepit, arching over the fire and extending down the sides thereof, having spaces between said legs for circulation of the hot air, and an inner face G in the upper part of said boiler forming an inner flue, substantially as de scribed.

2. In hot-water heaters, the combination of the fire-pit, the steam-tight inclosed boiler consisting of vertical water-legs extending down to the fire, having spaces between said legs, and an inner face G in the upper part thereof, provided with a V-shaped deflector mounted in the lower part of said face, and a passage leading to the draft-pipe, all substantially as and for the purpose described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

EDWARD M. ARNOLD. In presence of- EDWARD W. BLODGETT, W. W. BLODGETTI". 

